duck eggs, rich in nutrients, comparable to eggs, duck eggs contain protein, phospholipids, vitamin A, vitamin B2 , vitamin B1 , vitamin D, calcium, potassium, iron, phosphorus and other nutrients. Duck eggs have the effects of nourishing yin, clearing away heat, promoting body fluid and benefiting the stomach. It is more suitable for people with . Duck eggs taste more fishy than eggs, and fried duck eggs are harder and more woody, so they are usually pickled to cover the taste.
In the eyes of foodies, the taste of salted duck eggs is incomparable. The golden egg yolk and the peculiar egg white all leave a deep impression on people. In fact, in our country as early as the Southern and Northern Dynasties period, there is a record of salted duck eggs as food. Salted duck eggs have a long history and are rich in nutrition. They have become a common "national delicacy" in daily life.
In the past, every household in the countryside raised chickens and ducks, and ducks and eggs were also self-sufficient. Now most families don’t breed them. If you want to eat eggs and duck eggs, you can buy them in supermarkets or vegetable farms. They are not expensive and very convenient. Of course, if you want to buy the native eggs and duck eggs in the countryside, the price is still relatively expensive. After all, there is less land now, and even fewer people raise chickens and ducks with food. After going around the food market, you will find that there are actually two colors of duck eggs, one is "white shell" and the other is "green shell". Which one is better?
With this question, I consulted the seller, but they were not very clear about it. The duck eggs are divided into "white shell" and "green shell". Everyone seems to have not cared much about it. Anyway, what color the seller sells. Let's just buy the color. When picking the duck eggs, we just check to see if there are any blackened or broken shells. In fact, whether it is a "white shell" or a "green shell", they are all normal duck eggs. So, if it were you, how would you choose, "white shell" or "green shell"?
There was an experiment: green shell eggs and 20 white shell eggs collected from the same duck farm,Remove the eggshell and measure the thickness of the eggshell by sampling at three points; the remaining egg whites and yolks are thoroughly stirred and then sampled at multiple points to determine the nutrient content.
1. The thickness of the eggshell is different.
The results showed that the thickness of the shell of green-shell duck eggs was also significantly higher than that of white-shell duck eggs, and the difference between the two reached a significant level. Because processed products account for a large proportion of duck egg consumption, and the main cause of direct economic loss during processing is egg shell damage, it not only reduces the yield of egg products, but also affects the quality of egg products Therefore, the quality of eggshells is particularly important for the duck egg industry, which uses processed products as the main mode of consumption. Green-shell duck eggs with better eggshell quality undoubtedly have a very obvious competitive advantage. Therefore, the green duck eggs have a good market prospect.
2. Nutrition
The protein content of green-shell duck eggs and white-shell duck eggs are 14.8% and 14.2% respectively; green-shell duck eggs are 4.23% higher than white-shell duck eggs; zinc and selenium contents are respectively 11.9, 0.114 and 11.6 and 0.119 mg/kg; except that the content of selenium and lysine is slightly lower than that of white shell eggs, the content of the other 15 amino acids and zinc in green shell duck eggs is higher than that in white shell duck eggs.
The eggshell thickness of green-shell duck eggs is significantly higher than that of white-shell duck eggs, and the protein nutritional value of green-shell duck eggs is better than that of white-shell duck eggs. As a packaging property, eggshell color has a certain impact on consumers' purchasing psychology. Green-shell duck eggs have dense eggshells, smooth and shiny surfaces, and eye-catching colors, which are very popular among consumers. Some companies also put green-shell duck eggs in the brand duck egg market, and their prices are more expensive than ordinary duck eggs.
Why there are two colors
The color of eggshells is determined by several types of cellular metabolites. The main coloring substances include biliverdin and its zinc chelate, protoporphyrin, Coproporphyrin and so on. These ingredients are mixed together to give the eggs different colors. Genetically speaking, eggshell color is a polygenetic trait. These genes may be related to the synthesis of porphyrin and others. The color of the eggshell is also an important indicator of the hardness of the eggshell.
How to choose
Whether you choose eggs or duck eggs, first look at the color. Different colors have different prices. The shell of duck eggs is rougher than that of eggs. If you want to marinate duck eggs, you can't choose duck eggs with too smooth shells. This kind of eggs is not easy to taste. When picking eggs, it’s best to shake them to your ears, the ones with noise are not fresh.
How to preserve
When storing eggs or duck eggs, it is best to keep the big end up and the small end down to increase the shelf life of the eggs. If the number of duck eggs is small, they can be kept fresh in the refrigerator, but the shelf life will not be extended indefinitely, so they must be eaten soon. If the duck eggs are marinated, the shelf life can be greatly extended.
Marinated duck eggs
Duck eggs are rich in protein, which will be broken down into amino acids easily absorbed by the human body during the curing process. In addition, the yolk of salted duck eggs also contains a large amount of vitellin and carotene. Appropriate intake of these nutrients is also beneficial to human health. The nutritional value of salted duck eggs is high, and moderate consumption is not harmful to the human body. However, there are still some people who are not suitable for eating salted duck eggs. If such people continue to eat salted duck eggs, it is likely to cause a certain impact on the body.
Material: duck eggs, high white wine
Seasoning: table salt
Pickling method
Production method:
1. Wash the duck eggs, wipe or dry the water on it.
2. Put the water in the pot, pour the salt and boil to melt, let cool, and pour the white wine.
3. Place the dried duck eggs in a jar.
4. Pour salt water, press a bamboo curtain or a plate, soak all the duck eggs in the salt water, cover, and marinate for 30 to 45 days. The duck eggs will have a slightly salty taste at 30 days, and the duck egg yolk will have a lot of oil after 45 days; Salted egg is related to temperature. It is faster in summer and slower in autumn and winter.
5. Marinate the duck eggs until you think the salty taste is just right. Take out the duck eggs and wipe them clean. Roll them into a roll with 5 pieces of paper and store them in the refrigerator (fresh-keeping compartment). Soaking in salt water and getting saltier,It will not be that the egg whites of the duck eggs will harden because they are all cooked and stored.
As a good accompaniment, the salted duck eggs are very outstanding in terms of color and flavor. As a kind of food with high nutritional value, healthy people still need to eat it in moderation. For people who are not suitable for eating salted duck eggs, they should keep their mouths under control and do not affect their health due to small losses.
Well, today’s duck egg knowledge is shared here. After reading the above content, will it help you buy duck eggs and eat duck eggs? If you have any new insights, please leave a message in the comment area and discuss it with me. Your support is my biggest motivation every day. I am Duoma, thank you for watching.
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